The nervous sysyem because i looked it up on the internet. search gal stones effect which body system then but a dash .You will find that it says nervous system.
I'm not sure but it might be C
There is less diversity hope this helps
Fossils only form if certain qualifications are met, and some organisms cannot meet them, so they just cease to exist, not a single sign of them. This could happen if they were organisms that decayed completely. Fossilization can include freezing, drying, and encasement, usually in tar or resin.
